Try to sketch out designs for your Fakemon. Maybe just a cloud is not enough, add some facial features, appendages, etc. Ask yourself questions such as,
"Is this unique?" "Is this too much?" "Should I add more?"

Obviously I don't expect a beginner to make perfect pokemon designs and everything, but this is just for future reference. Speaking of references; remember that you can look at official Pokemon sprites to help, as a starter you can hone/improve your outlining by seeing that Pokemon sprites don't have that accidental dotted outlines. They're all smooth.

Looking and comparing the outlines only, you can see that on Castform the outline is not dotted and very smooth.